Perl Gtk無法創建抽象（非實例化）類型`GtkBox'的實例

Question

我想要一個簡單的Perl GtK GUI只包含一個窗口和一個垂直框。 我得到一個分段錯誤而在這之前的警告：「不能創建的抽象（非實例化的），例如輸入'GtkBox'」

的GUI是：

<?xml version="1.0" encoding="UTF-8"?> 
<interface> 
    <!-- interface-requires gtk+ 3.0 --> 
    <object class="GtkWindow" id="window1"> 
    <property name="can_focus">False</property> 
    <property name="title" translatable="yes">Text to EPUB</property> 
    <child> 
     <object class="GtkBox" id="box1"> 
     <property name="visible">True</property> 
     <property name="can_focus">False</property> 
     <property name="orientation">vertical</property> 
     <child> 
      <placeholder/> 
     </child> 
     <child> 
      <placeholder/> 
     </child> 
     </object> 
    </child> 
    </object> 
</interface> 

的代碼是：

#!/usr/bin/perl 
use warnings; 
use strict; 

use File::Spec::Functions qw(rel2abs); 
use File::Basename; 
use File::Copy; 
use Glib; 
use Gtk2 '-init'; 

my $basedir = dirname(rel2abs($0)); 

my $guifile = "$basedir/txt2epub1.gui"; 

print "GUI file: $guifile\n"; 
my $builder = Gtk2::Builder->new(); 
$builder->add_from_file($guifile) or die "Couldn't read $guifile"; 
$builder->connect_signals(undef); 


my $window = $builder->get_object("window1") or die "Can't open main window"; 

$window->show_all(); 

Gtk2->main(); 

# Callbacks 
sub cb_window1_destroy { 
    Gtk2->main_quit(); 
    exit; 
} 

Answer 1

XML文件這一行：

<!-- interface-requires gtk+ 3.0 --> 

但你的Perl腳本公頃s：

use Gtk2 '-init'; 

看起來您正在嘗試使用Gtk2庫加載使用Gtk3創建的文件。